L-carnitine, also known as L-carnitine, is L-carnitine for strengthening the body. Its chemical formula is C7H 15NO3, which is an amino acid that can promote the conversion of fat into energy. Red meat is the main source of L-carnitine.

The research on L-carnitine began in the early 20th century. 1905, Russians Gulewitsch and Krimberg discovered L- carnitine from meat extract. Since then, scientists from various countries have conducted in-depth research. Early research found that L-carnitine is a vitamin nutrient and named it vitamin Bt.